rf link

Hi All, I'm relatively new to scanner land and was noticing on a lot of the RadioReference frequency listings for my area that the fire departments each have their VHF frequency, but then there is also a UHF frequency labeled as RF Link or Link. I am not able to receive many of the farther out...

I am looking to control a GR1225 remotely using DTMF over a RF link. I would like to be able startup/knockdown function and channel sourcing. Are there any manufacturers capable of this task? If so, what models and difficulty level to enable and configure this device would be expected? Thanks